Warp stop-motion for looms.



H. I. HARRIMAN. I WARP STOP MOTION FOR LOOMS.

APPLICATION FILED JUNE 29, 1907.

2 SHEETS-@HBHT 1.

W'nesses: 22 en 502".-

5 M y 5' wzz zz g H. I. HARRIMAN.

WARP STOP MOTION FOR LOOMS.

APPLICATION FILED JUNE 29,1907.

Patented July 16, 1912.

2 SHEETS-SHEET 2.

pli-

f M s.

5 ean/OF}.

Witnesses.-

souus runs In. um. vmmnn. D

sra rnsrarnnrorrion.

pmnY'I} HARRIMAN, or HYDE PARK, MASSACHUSETTS, Ass GNoR iTo STHE s'ranronn v tourism, or BEADVILLE, MASSACHUSETTS, A CORPORATIONOF NEW JERSEY.

:To' it may concern: l ,Beit known that I, Hnxnrl. Hamnnan, 'a"citizen of'the United States, residing at {Hyde Park, in the county of Norfolk, State "5.:ofhlass'zrchusetts, have invented a certain jnew and useful Improvementin lVarp Stop- Motionsfor Looms, of which the following "is specification,reference being had thereinito the accompanying drawings. Thexint ention'relates to mechanicalwarp stop'm'otions for looms. A warp stop mo- {tionof this classcomprises, as is well known, nan-loving Ieeler, movable detectors which are controlled as t-o ttheir positions by the I5 warp-threads. with which they are engaged, "and held-out of the path of movement of theieeler so long' as such threads remain unbmken-and under proper tension, and de- .vicasb mains of which the working of the 0 loonfisarrestd when the feeler'in its niovc- --menttf engages with a detector that has position in consequence "of breaking-or undue slackening of the corre- -spending warp-thread. 2;; Thegnvention consists, further, in im- ;proved-' means for actuating the unshipping devices of'a loom under control of the feeler.

In accordance with this portion of the inventio'zgj the feeler-actuating rockshaft is "furnishedwith two" arms, one of which is fixed thereto while the other is spring-held :and :yielding, and the said rockshaft is rockdrby, means of a rotating actuator (preferably constituted by a crank) that is operatively connected with the said springl1eld or-yielding arm. The fixed arm is connected loosely bymeans of a longitudi nally adjustable link'with a catch thatws phiotedto a moving carrier which is op 40l-erated byamotating actuator (preferably constituted by a 0am). The loom unslnp- "-pi'ngiconnections have applied thereto a dog a da' tedto'be engaged bythe catclnthe said .cat cren'gaging with the said dog when th feeler and" rockshaft are arrested 1n their movement bye-dropped detector in the path. "of the feeder, and the engageinent of the cathh with the dog operating the said nnshipping connecti'onsto bring about the unshipping of iZhB lOOHL The'inven't on consists, further,- in means -for rendering the warp stop 'motion at will ,a'ridfor any desired length of time during "th e'ope ration of'the loom, inetf'ectiveto ophqyiunshipping "devices In accord Specification of Letters Patent.

warn? s ror-iao'rron non Looms. A

ance with this portion of the invention I provlde means for putting the pivoted catch, aforesaid outof action as long as it may he desired to render the warp stop motion in effective during the weaving. In the preferred embodiment of the invention I form the fixed arm of the feeler-actuatiug rock shaft with a notch into which the link aforesaid maybe hooked for the purpose of holding the catch elevated entirely out of reach of the dog of the unshipping connections. Another portion -of the'inventionconsists' in provisions for yieldinginteractionof the catch and .dog aforesaid whereby one of such parts shall be permitted to yield-to Patented Jul 3'16, 1912. Application filed June 29,1907, Serial no."38'1,4e1.

avoid breakage orother injury in case the catch should be in engagement with 'the dog at a time when the shipper "devices are 'op eratedflto start up the loom. Anoth portion of the invention consists in improved actuating mechanism for the working arts ofa war-p stop motion designed with especial reference'to enabling the timing ofthe said parts to be adjusted, and in particular to enabling the unjshipping of the driving power of a hour to be". so tuned as to cause the loom to come to'rest the said actuators to adjust the timing th'eref of with relation to each other and to the general. operation of the horn. hereby the actuators may be set to secure-the required timing in. the interaction of the catchand:

doggand also in the un'shipping ofth'e driv- .ing power so as tocause thei workingparts of the loom toconie' to rest with t lie'l-i 1y,e tc.,

in predetermined positions;

Embodiments of the WIIIOUS "featuresof" the invention are shown "in the drawings, .\vhich-latte1', I v Figure 1 shows in side elevation a'wa'rp stop motion in which the said features are i embodied, and a' portion "of the frame of a loom. only such parts-being shown as are necessary for making clear the nature of the which isfixed upon the said rockslihft for use in turning the latter by hand.

The whip-roll is represented in vertical cross-section at 5, Fig. 1, and at (3, G, are indicated warp-threads passing around the whip-roll and extending therefrom toward the front ofthe loom. At 7, 7, are indicated warp-separating .rods, alternate warp-threads being passed over these rods and the others beneath them.

' 2 The forward rod 7 constitutes one of the lease-rods.

A128 is the warp stop motion stand per-,-

taining to one side of the loom, a companion stand (not shown) being located at the opposite side of the latter .inf practice, and at '9, 9, .are the detector-supporting bars, they consisting of flat bars extending crosswise of the loom with their edges vertical. The

'bars 9, 9, are held in position by having their ends entered within vertical slots made in ears 10, 10, projecting from the stand 8 to- 'ward the-m ddle of the loom, whereby the bars are prevented from turning over, the said ends resting, upon a cotter-pin 11 that extends horizontally through holes in the lower portions of the said ears, whereby the bars are supported vertically, and the bars being prevented from rising by a cotter-pin passin through holes in the upper porqrtions of .t e said ears, above the .ends of the bars. The removal of the pin 12 permits thebars, or either of them, to be removed andieplaced when necessary.

. At 13, 13, are detectors consisting of strips -?0'f highly elastic sheet-metal, slotted longitudinally, strung on the respective bars-9, 9, and respectively hung upon the individual warp-threads. I p

","""t':"-At.14, 1-5, are supporting-rods for the 59 warp-threads, to uphold the latter was to pre'vent them and the detectors from sagging, located at front and rear, respectively, of thelines of detectors, and held in posi- 'ftion by having their ends entered between --5 vertical guide ribs 14*, 14, and 15, 15", projecting toward the middle'of the loom from the inner side of the warp stop motion stand.

'- Each of the said supportin -rods is supported vertically by means 0 a small block 16, fitting between two of the said guideribsand held in place by means of a bolt 17 which occupies a vertical slot 18 in the upright web of the stand 8, a washer 19 be' a pliedto the said stem between the .6 6- heir? of the said bolt and the outer face of roll stand, and having horizontal shelf upon which the foot 23 of the warp stop motion stand 8 rests. The stand 8 is secured to the stand 20 by means of the bolt 24 passlng through slots 25 andQG. respectively. which are formed in the said foot and table. respectively. Slot 25 extends transverseh with reference to the loom and slot 26 extends in the direction from front to roar.' these two slots providing forv universal adustment in a horizontal plane, and the slot 21-015 the intermediate stand providing for vertical adjustment of the said intern'iediate stand and the warp stop motion stand 8.

As thus. far described, the parts are netin themselves of the gist of the invention.

At27 is the feeler, and at 28 is one of the guide-ways which I provide for supporting the said .feeler in position and guiding it in its movemen s. The said guide way is shown forme portion of the warp stop motion stand 8. The guide-ways extend horizontally in the in connection with the lower direction from front to rear in the loom, and

on them'the feeler is adapted to slide back and forth. The guide-way shown in Figs.

1 and 2 is located immediately above the upper edge of the back-stop bars 29, Q9, and in equally close proximity to the edges of both of the latter. The said back-stop bars are supported at the side of the loom which is shown in Figs. 1 and 2 by the inwardly extending lower extremity of the stand 8, to whlch extremity the ends thereof are made fast by means of a bolt 30, and are] similarly supported at the other side of the loom.

For the actuation of the feeler, it is connected by links, one of which is shown at 31.

with arms, one of which is shown at 3-2, fixed upon a rockshaft 33 extending across the loom at one side of the lines of detectors.

The feeler-aetuating rockshaft 33 is sup- 1 ported by bearings 34; with which the warp stop. motion stands are formed, and at the side of the loom shown in the drawings it is extended outward beyond the said bearing for the convenient connection therewith of the devices by means of which it is rocked, and also of the devices by means of which the unshipping of the loom-is brought about. This extended'portion of the rockshaft, near "isrocked comprise an arm, designated 40 in I igs. 1 and 2, which is mounted upon the saidv rockshaft, a connecting-rod 41 having its upper end. connected p'ivotally to the said arm,a connector 42 having a sleeve through which the lower end of the said -conne( 1ting-,1'od ,ex tends, and within which jifizjsleev ethgsaid rod is clamped by a clampings re vAE-B, and a rotating actuator con stitnted by. the crank 44, to the crank-pin ...o f.which the said connector is pivotally s hung. The said devices are made yielding,

in order that, when the feeler in its reciprocationencounters a dropped detector and presses the lower end of the latter against a back-stop bar 29, as indicated in Fig. 1,

the sliding movement of the feeler in that direction, and consequently the turning movementof the rockshaft 33, may-be arrested. To this end, a spring is interposed in the train of COIIHQCUOIIS and when the I: 1 resistance by which the sliding movement is opposed becomes sufiicient to overcome .the tension of the said spring, the latter ields, In Figs. 1 and 2 the arm is oosely hung upon the rockshaft 33, between thebearing at the end of the arm 36 and the hub of an arm 45 which is fixed by means of a clamping-screw 46- upon the outer ext-remity of the rockshaft, and a con tracting' spiral spring 47 has one'end thereof engaged with thexsaid loosely hun arm 46and the other end thereof engaged with the said fixedly mounted arm 45. The said spring operatesto hold a shoulder 400 of the loose arm 40 and a portion of the fixed arm 45 pressed together so that movement t. insmitted to arm 40 causes rockshaft 33 to turn in unison with such arm 40 except -when, in the movement of the feeler from left to'right in Fig. l, the feeler encounters a Ydroppeddetector and is held from further movement in that direction by the resistance offered by the back-stop against which the detector takes hearing. In this event, the corresponding turning movement of. the rockshaftbeing arrested, the spring 47 yields'and permits arm 40 to move relativ'e'ly upoirthe rockshaft, as represented Tin thesaidfigure'x When subsequentmove- "merit of arm 40 in the opposite direction ytalge'splace, the tension of the spring 47 operates to restore the shoulder 400 todts. bearingagainst the fixed arm 45. In Figs.

1 and 2, 1Ii which only two back stop bars 29, 29, are-employed, one at the right hand side ofie'ach line of detectors, the arm 40 is intended to yield only during the stroke cf. the feeler from left to right in'such figure. It is not necessary that the arm should yield in the movement of the feeler from right to left, because the stroke from left to right does not carry the feeler quite to the right hand stop-bar, and consequently, a detector of the right hand line canno' drop down at the left hand side of the feeler so as to arrest the return stroke of the latter to the left, and should a detector of the left hand line drop while the feeler is at the right hand of such line, the feeler in its movement to the left will bend the lower end of the dropped detector ahead of,

it toward the left until, there being no back-stop bar at the left hand side in position to prevent such bending, the feeler passes -out from under such detector. The arm 40 of Figs. 1 and 2, therefore, needs to yield only during the stroke of the feeler from left to right insuch figures. The feeler of Figs. 1 and '2, it will be perceived, makes its detecting stroke in one direction only.

Fig. 3 shows a construction designed for employment with three back-stop bars '29, 29, 29, and in which the arm 40 is arranged to yield in case of encounter of the feeler with a dropped detectorin the movement of the feeler in either direction, In

Fig. 3, the said arm has an extension which i is formed with a longitudinal slot 40* that accommodates the rockshaft 33, and with contact-projections 40, 40, at opposite sides of the ;;id slot. A piece 45* fixed upon the outer end'of the rockshaft has opposite bean ing faces 45, 45, and an intermediate triangular projection 45. A contracting spiral spring 47 has one end thereof engaged with the outer extremity of arm 40 and the other thereof with the fixed piece 45. The tension of the said spring operates to hold the two contact-projections 40, 40, squarely against the two bearing faces 45, 45, at opposite sides of the triangular projection 45, which enters between the said contact-projections and operates to preventundesired angular displacement of the arm 40. So long as the feeler is not opposed in its rcciprocatory stroke in either direction, the rockshaft 33 is caused to rotate in unison with arm 40'by the tension of the spring. In case, however, the feeler encounters a dropped detector in its movement in either direction, it first presses such detector against the back-stop bar which is in-position to oppose "the movement of the detector with the feeler, and then its movement and that of the rockshaft is stopped,

whereupon spring 47 yields, permitting the arm 40* to turn relative to the rockshaft. In thus turning the said arm swings upon the point of contact between the leading contact-projection 40 and the corresponding bearingface 45, the slot 40 permitting the arm 40 to shift-glengthwise somewhat with relation to the r'gckshaftl When sub s e- 'quent movement of.,arm 40 in the' other .di-.

rection relieves th'e tension 1of spring;47-,

the said spring, causesthe arm 40 to re-. [cover its normal position, with both con-- tact-proilections 40, 40,

resting squarely 45, 45". When the upon the bearing-faces devices of "Fig. 3 are'employed, each move-- lower portion 51 of the said link is pivotally connected, a movable carrier 53, 54 to which the said catch is pivoted at 55, a rotary actuator 56 in operative control of the said carrier, a dog 57 adapted to be engaged by the said catch, an unshipping rod 58 upon which the said dog is mounted, and an arm 59 fixed upon theshipper rockshaft and having the forward end of the said rod con-1 nected therewith. The said rota-ryactuator is, in this instance a cam, and the carrier comprises-a member 54, mounted plvotally at 60 and engaged by a contracting spiral spring 61, by the tension of which the lower arm of such member is held in contact with the face of the said cam. The upper member 53 of the carrier is fitted to the upper arm of the lower member with capacity for longitudinal adjustment thereon, and is clamped in the position to which it has been adjusted upon the said arm by means of a screw 62, the stem of which passes through a longitudinal slot -63 formed in the arm. The vibratory motion that is communicated to the carrier causes the catch tomove back and forth with relation to the dog 57 The connection of the catch with the fixed arm 48' of the feeler-actuating rockshaft by means of the link operates to raise the engaging portion of the catch above the dog as the feeler completes its feeling stroke.-

The actuator for the fe'eler and that for the catch are so timed, and the parts are so set and adjusted, that each time the feeler is caused to make its feeling stroke the catch is caused to make its stroke in the direct-ion to engage the dog connected with the unship ping rod, but so long as the feeler is permitted to completeits said stroke the catch is lifted by its connections with the feeler rockshaft 33, so as to prevent it from engaging with the said lug. When, however, the feeler is arrested before the completion of its feeling stroke, the catch is not lifted, and the latter, as itiis moved by the action of the sha'ft and-unship the driving power otthe loom. The link by which the catch 52 is operatively connected with 'arm 48 of the 'feeler rockshaft 'cornprises a lower member or connector 51 which is pivotally hung to the catch at 51 and provided at its upper end with a perforated ide 51 and an up per member a9 forme of wire having its upper end hook-shaped to enter the slot 48 of arm 48, the lower end of said wire passing through the hole of the said guide 51 and havingap'plied thereto below the guide a'collar 50 which is fixed adjustably in position thereon b a clamping screw 50. The adjustability of the' said collar enables the operative length of. the link to be varied, so

"gaging portion of the dog may beadjusted to secure the proper interaction between the two, and so, also, that such length may he made to suit the height to whic mediate stand and warp stop motion stand are adjusted in the loom. v

For the purpose of putting catch out of action temporarily during the weaving, asfor instance when it is desired! that the loom shall be run continuously while weaving past ahreak-out in the warpthreads occasioned by a smash, the arm8 is formed with a notch or recess 4:8 extending off from the slot 4:8 at a height such. that when the top end of the'upper member 50 of the link is lifted up into the said, notch or recess the catch 52 will be held raised sufliciently high at all times to prevent it from engaging with the dog 57. Until the top end of the said link member 50 is dropped into the lower end of slot 48* the unshipping action of the warp sto motion devices will be suppressed. When t e weaving has progressed so far that the ends of all to thebreak from thewarp-beam have been woven in, the disengagement of the said top end from the said notch or recess will render the warp. stop motion; devicesefiective once more to arrest the working of vthe loom a warp-thread.

other injury in casethe catch and dog should be in engagement with each otherlat a time when the shipper devices are oper ated to restart the weaving instrumentalities, the dog 57 is pivoted at 57 upon an arm 57". projecting from a collar "or hub 57 mounted upon unshipping rod 58 and fixed in place thereon by a clamping-screw 57. The body of the dog is held normally against one end of the said collar or hub that the height of the engaging portion of the moving catch with relation to the enthe pivoted thebroken warp-threads extending forwardin case of breakage or undue slackening of For the purpose of avoiding :breakage'or the inter? nism, and to cause the required movement to be transmitted to the unshipping rod and shipper-devices for unshipping the driving power. However, should the catch "ud dog happen to be in engagement with cash other at a time when the shipper-devices are actuated to restart the weaving instrument-alities, as for instance in a wettreplenishing loom 1n whlch the action of the weaving instrnmentalities is arrested for the performance of the replenishing operations and automatically restarted after they have been performed, the spring will permit the dog to For the actuation of the rotary actuator (crank) for the feeler-devices, and of the rotary actuator (cam) for the catch, the

crank 44 and cam 56 are fixed upon a short,

rotating shaft 64 which is operatively connccted withthe camshaft -35 of the loom by means of a spur-gear 66 fixed upon the said shaft 64, and a spur-pinion 67 fixed upon the cam-shaft. For the purpose of enabling the said actuators to be set to adjust the timing thereof with relation to each other and to the general operation of the loom, each thereof is fixed upon the shaft 64 by means'of two clamping-screws, those employed in connection with the hub of the crank being designated 44:, 44, and those employed in connection with the cam being designated 56, 56 After loosening the screws of the respective pairs, the crank and cam may be given any desired angular shift around the shaft 64, and then be secured in the position of adjustment by tightening up such screws again.

The proportions between the spur-gear 66 of the warp stop motion shaft 64 and the driving spur-pinion 67'on the cam-shaft of the loom are as 2 to 1. Consequently, the said warp stop motion shaft makes one rotation to each two rotations of the said camshaft and each four rotations of the crankshaft ofthe loom. The crank 44 of Figs. 1

Y and 2 occasions one complete reciprocation of the feeler in each rotation thereof, while the cam 56 produces the engaging stroke of the catch 52 only as the feeler moves from left to'right. Consequently the detecting stroke of the feeler takes place once every four picks. The cam 56 of Fig. 3 has two opposite throws, producing an engaging stroke of the catch every two picks, that is to say, for each stroke of the feeler in either direction, and hence the construction shown in Fig. 3 will act more promptly in occasioning the unshipping of the loom after bre kage at a warp-thread Occurs,

To prevent the catch 52 from dropping too low in its descending movement permitted by the swing of arm 48 of thefeeleractuating rockshaft 33, itis provided with an adjustable contact-screw 52 -that is adapted to take bearin against the upper surface of a shelf 53 iorming part of the upper member 53 ofthe carrier for the said catch. By turning the said contact-screw, the limit of the descending movement of the engaging end of the catch may be adjusted to suit the height of the upper end of the dog, thus making it possible to prevent the said end of the catch from dropping below the said end of the dog.

I claim as my invention 1. In a warp stop motion, in combination, a vertically adjustable warp stop motion stand, detectors mounted therein, a feeler, a feeler-actuating rockshaft supported by'the said stand, a yielding arm connected withsaid rockshaft, means for operating the arm to actuate the rockshaft, unshippiri devices, a moving carrier, a catch and dog or inter engagement to actuate the said unshipp' devices, one thereof connected with the's d ifi unshipping devices and the other with the said carrier and operated thereby, andrconnections, including a longitudinally adjustable link through which one' of the said interengaging elements is controlled as to its ppsiftion from the said feeler-actuating rocksa t.

the feeler, the feeler-actuatin rockshaft having a yielding arm and a xed arm, a. crank operatively connected with the said yielding arm, a moving carrier, a cam actuating the said carrier, unshipping connections, a catch and dog for interengagement to actuate the unshipping connect1ons,'one thereof connected with the latter and the other with the said carrier, and a lon 'tudinally adj ustable link connecting said xed arm with one of the said interengaging elements, whereby the position of the latter. is controlled.

3. In a warp stop motion, in combination, a feeler, unshipping devices, a catch and dog for-interengagement to actuate the said unshipping devices, controlled as to such interengagement through the action of the feeler, means for causing one thereof to feel for the other thereof regularly during the working of the loom, and means to prevent interengagement at will.

4. In a warp stop motion, in combination, the feeler, the feeler rockshaft having the slotted arm, 'unshipping devices, a catch and a dog for interengagement to actuate the said unshipping devices, and a link connectin one of the said interengaging elements with the slotted arm, the said arm having the notch or recess for said link whereby the said interengagemeut may be suspended to render the warp stop motion temporarily in- 1 interengagement through the action of the feeler, and having provisions for yielding interaction to obviate breakage in case the catch should be in engagement with the dog at a time when the shipper-devices are operated to start up the loom;

- 6. In a warp stop motion, in combination,

a feeler, an unship'ping device, the yielding dog connected with the said device, the

"catch controlled as to its engagement with said dog through the action of-the teeler, means to actuate the said catch the said dog giving way in case the catch should be mengagernent with the dog at a time when the shipper-devices are operated to start up the loom.

7. In a warp stop motion,

connected with the said unshipping devices, .a catch for engagement with said dog, the

said catch and dog engaging with each other under control of the feeler, ,a carrier for the said'hatch, the rotary actuator for the said feeler and the rotary actuator for the said carrier, connected to rotate in, unison, a

in combination, 'the feeler, the unshipping devices, a dog [sesame lOOHPShafiZ, and gearing for driving said actuators from saidloom-shaft.

v 8. In a warp stop motion, in combination, the feelerythe unshippingdevices, a dog connected with thesaid unshipping devices, a catch .cooperating'with said dog under the control of-the feeler, a carrierfor the said catch, the rotary actuator-for the said feeler and'the rotary actuator for the said carrier, the camshaft of the loom, gearing for driv ing the said rotary actuators" from the said cam-shaft, and means for setting the said actuators to adjust the timing'thereof.

9.111 a warp stop motion, in combination, the feeler, the unshipping devices, a dog connected with the said unshipping devices, a

catch cooperating with the said dog under the 'contr'ol of the feeler, a carrier for the said catch, the rotary actuators for the said feeler and carrier, respectively, the camshaft of the "loom, a supplementaryshaft carrying the said actuators, and gearing for driving the said supplementary shaft from the cam-shaft.

In testimony'whereot I afiix my signature inpresence of two witnesses.

HENRY I.- HARRIMAN.

Witnesses:

CHAS. F. RANDALL, EDITH J. ANDERSON. 

